
    //var _ = require("underscore")._;

    _.each([1,2,3],function(ele,idx){
        console.log(idx+":"+ele);
    })

    console.log(
        _.map([1, 2, 3], function(num){
            return num * 3;
        })
    );

    var arr = [1, 2, 3];  
 
    _(arr).map(function(item, i) {  
        arr[i] = item + 1;  
    }); 
    console.log(arr); 
     
    var obj = {  
        first : 1,  
        second : 2  
    }  
     
    _(obj).each(function(value, key) {  
        return obj[key] = value + 1;  
    });
    console.log(obj)
